antibody testing in Spain - one of the countries hardest hit - tested 70,000.
5% had antibodies
In the Madrid region - the epicenter of the outbreak - 14%
You are talking 60+ percent for any type of herd immunity - which really is only discussed in modern times under the guise of a vaccine.
In loosey goosey Sweden they were at like 7 percent according to the article. Long way to go.